package com.mayikt.api.utils;

import java.security.MessageDigest;

public class MD5Util {
    /**
     * 盐值
     */
    private  static  final String SALT="mayikt";
    public final static String MD5(String s) {
      char hexDigits[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
      try {
         byte[] btInput = (s+SALT).getBytes();
         // 获得MD5摘要算法的 MessageDigest 对象
         MessageDigest mdInst = MessageDigest.getInstance("MD5");
         // 使用指定的字节更新摘要
         mdInst.update(btInput);
         // 获得密文
         byte[] md = mdInst.digest();
         // 把密文转换成十六进制的字符串形式
         int j = md.length;
         char str[] = new char[j * 2];
         int k = 0;
         for (int i = 0; i < j; i++) {
            byte byte0 = md[i];
            str[k++] = hexDigits[byte0 >>> 4 & 0xf];
            str[k++] = hexDigits[byte0 & 0xf];
         }
         return new String(str);
      } catch (Exception e) {
         e.printStackTrace();
         return null;
      }
   }

    public static void main(String[] args) {
        String mayikt = MD5Util.MD5("123456");
        System.out.println(mayikt);
    }

}
